Razor strop



w. STOCK RAZOR STROP Sept. 13, 1932.

Filed June 24. 1931 INVENTO":

Manor-ER Srocn a 044w 5e Patented Sept. 13, 1932 UNITED STATES PATENT"OFFICE This invention relates to devices used in resharpeningrazor-blades.

One of the objects of this invention is to provide a stropping device inwhich the side wise shifting of an inserted razor blade, by means of theholder parts of the device and. the rotating movements of the sharpeningmembers of the device are jointly operative by the same operating means.

Another object is to provide a device in which one-edged as well astwo-edged blades can be sharpened equally well.

Another object is to make the blade holder parts removable andexchangeable to facilitate an insertion of any type of blade.

Another object is to provide a device in which the turning as well asthe shifting movements in one direction are produced manually while suchmovements in the opposite direction are produced automatically.

Other objects will appear from the following description and appendedclaimas well as from the accompanying drawing, in which n Fig. 1 is across section through the bladeholders and sharpening members on line 11of Fig. 2.

Fig. 2 is a longitudinal midsectional view of a simple stropapproximately on line 22 of Fig. 1. I

Fig. 3 is a cross section on line 33 of Fig. 2, illustrating thecooperative parts for tilting the blade-holders automatically by meansof the swingably mounted outer drum.

Fig. 1 is a cross section on line 4l4c of Fig. 2, illustrating the partsby which the outer drum is oscillated by means of the flexible operatingor pulling member as this member is being drawn from the casing orreleased to go back into the casing. 1

Fig. 5 is a fragmentary somewhat schematic illustration of a slightlymodified form of sharpening members or rollers arranged tosimultaneously contact the opposite edges of two-edged blades. I

Fig. 6 is a somewhat diagrammatic illustration of circles to representthe interengagement of the gears of the slightly modified form of Fig.5.

The casing 7 is provided with a boss 8 upon ANGELES, CALIFORNIA srnor V1931. Serial No. 546,601.

which the spring 9 is mount-ed forcontrolling the movements of the innerdrum 10, one end of the spring being secured to or engaged with the bossas indicated at 11 while the other end of the spring is secured to orengaged with the drum 10, by which the drum is held under tension in,one direction turnable with respectto the casing.

To the outside of the inner drum10,a flexible operating or pullingmember 13 is secured or attachedas indicated at 14:, by which the innerdrum can be rotated against the tension of the spring 9.

Gears 15 and 16 operatively connect the sharpening members 17 to theinner drum 10 so that the rotation of the inner drum results in arotation of the sharpening members or rollers 17. 7

When a razor-blade 18 is inserted between the holding members 19 it canbe swung either to the one or the other of the sharpen-v ing members 17to bring the razor-edge into contact with the surfaces of these sharpening members while the sharpening members are being rotated and while theblade is shifted back and forth in a customary and desired manner forproperly sharpening the razorblade.

The turning or swing as well as shifting movements are made possible bymeans of the shaft-like portion 20 from which the holding membersl9project in a sidewise direction.

This shaft-like portion 20 is provided with a hook-like end 21 to engagewith the screw-. end 22, which is a rigid part of the structureembodying the inner drum 10 and the gear 15, so that, upon a rotating ofthe drum and gear and screw, the shaft-like portion 20 by means of thehook-end 21 is shifted endwi'se while sliding along the threads ofthescrew, such endwise sliding of the portion 20 being within thesleeve-portion 23 of a tilting con trol-member.

A slot orcut-out 24 in the sleeve-portion 23 facilitates the insertionofthe blade-holder from the end of the sleeve and also the slid ing ofthe shaft-like portion of the'bladeholder withinthe'sleeve'while theedges alongthe slot abut firmly against the sides ofthe blade-holders,the sleeve being turnable within the bearings 25 and 26, the turning ofthe sleeve being controlled by the lever 27.

Inasmuch as the edges along the slot 24; abut closely against the sidesof the holder members 19, as clearly illustrated in Fig. 1, and themovements being controllable by the lever 27 on the sleeve 23, anyswinging move ment of the lever 27 and therewith any oscillatingmovement of the sleeve 23 results in a corresponding oscillatingmovement of the blade-holder. v

To produce such oscillating and combined endwise movement for theblade-holder by means of the screw-end 22 and thelever 27,;

these two parts are jointly operated by a common mechanism, theoperating parts for the screw-end 22 having been described above, toresult in the endwise shifting of the bladeholder by means of theengagement 2122, while the lever 27, by means of the pin 28, isoperatively engaged with the outer drum 29, which is turnably or ratheroscillatory mounted with respect to the inner drum 10, and operative bymeans of the flexible pulling or operating member 13. v

The outer drum 29 is normally held with its shoulder-piece 30 abuttingagainst the shoulder-piece 31 of the casing 7 under the tension of thespring 32, the casing 7 having been provided with a slot 33 withguidingedges 33,, and the outer drum having an aperture 34 withguide-edges 34,, so that the pulling member 13 is brought to the bentposition indicated at 13 in inoperative position.

' Upon a drawing of the flexiblemember 13 from the casing 7 through theslot 33, on having to overcome the tension of the spring 9, the flexiblemember 13 straightens out sufficiently to press against the guiding-edge34 of the slot in the outer drum 29, to rotate or swing this drumagainst the tension of the spring 32 until the guide-edge 34,, reachesthe position indicated at 3 1,, in Fig. 4, the straightening of theflexible member being indicated in dotted lines at 133 thereby impartinga swinging movement to the lever 27 y means of the pin 28 on the outerdrum 29.

A further drawing of the flexible member results in a turning of thescrew-end 22 and thereby in a shifting of the blade-holder as well as ina rotating of the sharpening members 17 by means of the gears 1516.

As the flexible member is released, all movements are reversed, thespring 9 serving to rotate the screw-end 22 and the gears 1516 in theopposite directions, and the spring 32 returning the outer drum to itsnormal inoperative position and thereby swinging the blade-holder in theopposite direction.

From the above it will be understood that by a combination manual andautomatic operation the two opposite sides of a single cutting'edge aresharpened, or, in other words, a sharpening of a single-edgedrazor-blade can be accomplished by an alternating pulling and releasingof the flexible member 13.

Furthermore, it must be understood that the two opposite edges of atwo-edged razorblade can be placed into sharpening positions within thisdevice one after the other.

On the other hand, it must be understood that the device can easily bemodified to accommodate both edges of a two-edged razorblade.

' Such a slight modification is easily explained on the rough outlinesof the gears in Figs. 5 and 6. Assuming the gear 15 to be the same as inF ig. 2 with the same or a similar function and also the same or similaroperative connections, this gear 15 of Fig. 5 to be represented by thecircle 15 in Fig. 6, wider intermediate pinions 36 of Fig. 5,represented by the circle-s 36 in Fig. 6, can readily be meshed withother gears 37 in Fig. 5 as represented by the circles 37 in Fig. 6,whereby a simultaneous sharpening of the opposite edges of a two-edgedrazor-blade can easily be accomplished while the blade swings to eitherthe position indicated at I or Il by eventually a similar shaft-likemember as indicated at 20 in Fig. 2, which certainly will easily beunderstood without further illustration.

Having thus described my invention, I claim: I

' In a razor-strop, sharpening-members, a blade-holder, a rotatingmechanism including a screw-end, an engagement between the said screwand said blade-holder whereby the blade-holder can be moved endwise,means for operatively connecting the rotating mechanism with thesharpening-members, a tension-means for operating the rotating mechanismin one direction, a flexible member for manually operating the rotatingmechanism in the opposite direction against the tension of thetension-means, a drum concentrically mounted to rotate around saidtension-means and having an aperture through which the said flexiblemember'passes outwardly, an engagement between the drum and blade-holderadapted to swing the blade-holder to opposite positions with respect tosaid sharpeningmembers, and a spring for actuating the drum to swing toone position when the flexible member is released while yielding to apulling and thereby a straightening of the flexible member adapted toresult in a contacting of the flexible member with a wall of saidaperture and thereby resulting in a swinging of said drum and therewithof said blade-holder to the opposite position. V,

' In testimony that I claim the foregoing as my invention I have signedmy name.

' WALTER srocK.

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